Drill jig sleeve for equipment

ABSTRACT

A guide sleeve for a twist drill, the guide sleeve being held in a drill block against rotation and also against movement axially of the sleeve. The sleeve has a cylindrical exterior. A stamping of relatively flat stock has a hole in one end encircling and fastened to the sleeve at the entrance end, as for example by welding, soldering or metal glue. Additionally, a portion of the stamping engages the surface of the drill block to space the entrance end from the drill block and a threaded stud in the drill block has a position spaced a short distance from the sleeve and engages a radially extending end of the stamping to prevent rotation of the sleeve when the drill is injected into it.

United States Patent Continuation-impart of application Ser. No.722,396, Apr. 18, 1968, now Patent No. 3,535,956. This application Apr.4, 1969, Ser. No. 813,674

[54] DRILL JIG SLEEVE FOR EQUIPMENT 9 Claims, 24 Drawing Figs [52] US.Cl 408/241 [51] Int. Cl B23b 49/02 [50] Field of Search 77/62 B;

[56] References Cited OTHER REFERENCES Publication: American Machinist.Volume 54, No. 23, dated June 9, 1921, pages 997 and 998, articleentitled Tool Engineering," by Dowd et al. (FIG. 63)

Primary Examiner-- Francis S. Husar Atlurney-Beehler & Arant ABSTRACT: Aguide sleeve for a twist drill, the guide sleeve being held in a drillblock against rotation and also against movement axially of the sleeve.The sleeve has a cylindrical exterior. A stamping of relatively flatstock has a hole in one end encircling and fastened to the sleeve at theentrance end, as for example by welding, soldering or metal glue.Additionally, a portion of the stamping engages the surface of the drillblock to space the entrance end from the drill block and a threaded studin the drill block has a position spaced a short distance from thesleeve and engages a radially extending end of the stamping to preventrotation of the sleeve when the drill is injected into it.

PATENIED 11mm $527,439

I N VEN Toe PE 7512 Gwe 71/ PATENTEU DEE! 412m I 3 273139 sum 2 [IF 3 xi if? /0 IN VE/V Toe PE TE/E (Ir/v0 7'/-/ ww a DRILL JlG SLEEVE FOREQUIPMENT This is a continuation-in-part of Ser. No. 722,396, filed Apr.18, 1968, now US. Pat. No. 3,535,956.

Drill jig guide sleeves generally have long been in use for locatingproduction drilling operations so that a hole drilled into a workpieceis drilled in the proper location. The sleeves are customarily ofhardened metal to resist wear, and thus constructed are adapted to beused repeatedly for long periods before they require replacement.customarily, the sleeves are provided with a head larger in diameterthan the body of the sleeve thereby to limit endwise movement of thesleeve into the drill block when they have been fastened to the drillblock in various ways, as for example by a threaded stud with arelatively large head adapted to overlie a shoulder on the sleeve. Thesethreaded studs are intended to be removable so that the sleeve itselfcan be removed and replaced when worn or when, for example, a twistdrill of different diameter might be needed.

Necessarily, when a sleeve having a head is employed, there is expenseinvolved in the forming operation since usually the stock must be aslarge in diameter as the head and the stock then machined to a smallerdiameter throughout that portion which is to be inserted in a bore inthe drill block. Obviously, there is an excess of metal which must bepaid for and disposed of and attendant machining operations which arecostly to a degree.

Among the objects of the invention is to provide a new and improveddrill jig guide sleeve which is relatively inexpensive in that simple,inexpensive forms of raw material are used, such for example as atubular shaft and a sheet metal stamping assembled together in a form soas to serve as a drill jig guide sleeve.

Another object of the invention is to provide a new and improved drilljig guide sleeve wherein the usual head is omitted and wherein a formedmember is substituted therefor, the formed member being deformed in suchfashion as to serve the double purpose of inhibiting the sleeve againstrotation and also preventing it from being shifted endwise in the drillblock.

Still another object of the invention is to provide a new and improveddrill jig guide sleeve which is so designed and constructed as to reduceto an appreciable extent the fabricating cost.

Also included among the objects of the invention is to provide a new andimproved drill jig guide sleeve which, despite its inexpensive andsimplified construction is a dependable and accurate tool accessory.

With these and other objects in view, the invention consists in theconstruction, arrangement, and combination of the various parts of thedevice, whereby the objects contemplated are attained, as hereinafterset forth, pointed out in the appended claims and illustrated in theaccompanying drawings.

In the drawings:

FIG. 1 is a plan view of a drill block showing one form of the inventionplaced thereon.

FIG. 2 is a longitudinal sectional view on the line 22 of FIG. 1.

FIG. 3 is a fragmentary sectional view on the line 3-3 of FIG. 2.

FIG. 4 is a perspective view of the formed member.

FIG. 5 is a plan view of a second form of the invention in place in adrill block.

FIG 6 is a longitudinal sectional view on the line 6-6 of FIG. 5.

FIG. 7 is a fragmentary sectional view on the line 7-7 of FIG. 6.

FIG. 8 is a perspective view of another type of formed member of FIGS. 5through 7.

FIG. 9 is a plan view of another form of the invention in place in adrill block.

FIG. 10 is a longitudinal sectional view on the line 1010 of FIG. 9.

FIG. 11 is a fragmentary sectional view on the line 11-11 of FIG. l0.

FIG. 12 is a perspective view of the fonned member of FIGS. 9 through11.

FIG. 13 is a plan view of still another form of the invention placed ina drill block.

FIG. 14 is a longitudinal sectional view on the line 14-14 of FIG. 13.

FIG. 15 is a fragmentary sectional view on the line l5-15 of FIG. 14.

FIG. 16 is a perspective view of the formed member of FIGS. 13 through15.

FIG. 17 is a plan view. of another form of the device.

FIG. 18 is a longitudinal sectional view on the line I8--l8 of FIG. 17.

FIG. 19 is a fragmentary longitudinal sectional view on the line 19-l9of FIG. 17.

FIG. 20 is a perspective view of the formed member of FIGS. l7, l8 andI9.

FIG. 21 is a plan view of still another modification in form of theinvention.

FIG. 22 is a longitudinal sectional view on the line 22-22 of FIG. 21.

FIG. 23 is a fragmentary sectional view on the line 23-23 of FIG. 21.

FIG. 24 is a perspective view of the formed member of FIGS 21, 22 and23.

In an embodiment of the invention chosen as a first form forillustration there is shown a drill block 10 provided with a positioningslot 11 in which is located a workpiece 12. In the drill block is a bore13 adapted for reception of a drill jig guide sleeve assembly indicatedgenerally by the reference character 14. A clearance hole 15 is in axialalignment with the bore 13 to accommodate a conventional twist drill I6when it is driven through the workpiece 12.

The drill jig guide sleeve is made up into an assembly with a stampingmember indicated generally by the reference character 17 and shown inperspective view in FIG. 4.

A drill jig guide sleeve member 18 is generally tubular in form andprovided with a central axial passage 19 to accommodate the twist drill16. Although the drill jig guide sleeve in the chosen embodiment is aright circular cylinder, it will be understood that the exteriorcircumference is not limited to a rounded or circular fonn butcontemplates exterior forms of various shapes which are substantiallyuniform from end to end and devoid of protuberances.

Adjacent one end of the sleeve member 18 is an area 20 which customarilyextends throughout the entire perimeter. A portion 21 of the stampingmember 17 has a hole 22 adapted to receive the sleeve member 18 so as topositively encircle the sleeve member 18. To assure that there will notbe any rotation between the drill jig guide sleeve and the stampingmember, the stamping member is fastened to the sleeve by some means,such for example as metal glue, welding, or soldering, especially onthose occasions where the sleeve is of rounded exterior rather thanbeing of noncircular cross-sectional shape.

Further, although the member 17 has referred to as made from a sheetmetal stamping, the object is primarily low cost and other metal formsmay also be found acceptable.

In the form of device of FIGS. 1 through 4 inclusive, another portion 23is bent around itself in a U-shape, a long leg 24 of which extendsoutwardly for a short distance in a direction substantially tangentialto the sleeve member 18. A bend of substantially provides a space 25 sothat one side of the portion 24 engages an adjacent face of the drillblock.

A threaded stud bolt 26 has a threaded shank 27 in threaded engagementwith the drill block 10 and is preferably threaded into positionfingertight. The stud bolt 26 is in such location that it has a positionof engagement with the portion 24 of the stamping member and serves thedouble purpose of holding the stamping member 17 down against an upperface of the drill block and preventing rotation of the sleeve assemblywhen the twist drill 16 is operated in conjunction with it. Similarly,the stamping serves a double purpose in that the portion 24, by beingbrought into engagement with the adjacent face of the drill block,positions the sleeve member 18 with respect to the block in an axialdirection, as determined by the space 25 at the 180 bend in the portion23. Moreover, fastened as described the stamping member also preventsthe sleeve from rotating during use.

In a second form of the invention illustrated in FIGS 5, 6, 7 and 8 astamping member 30 has a slightly difi'erent form. In this instance aportion 31 has a hole 32 which encircles the sleeve member 18, but aportion 33 which extends outwardly from the sleeve is straight andengages a stud bolt 34 at a location spaced substantially from theadjacent face of the drill block 10. Tl-Ie portion 31 moreover is at alocation such that its axis is substantially in alignment with the axisof the sleeve member 18 rather than being in tangential relationship. Asecond outwardly extending portion 35 extends a short distance radiallyand then has a 90 bend 36 so that an end 37 can be brought into directphysical contact with the adjacent face of the drill block and in thisway position the sleeve member 18 with respect to endwise movementrelative to the drill block. In this instance also, some adhesive meanssuch as metal glue, a weldment, or solder may be employed to anchorthestamping member 30 to the sleeve member 18.

In the form of invention of FIGS 9, 10, l l and 12 a stamping member 40has a portion 41 containing a hole 41 encircling the sleeve member 18within the perimetral area 20 and a portion 42 extending in a radiallyoutward direction into engagement with a stud bolt 43. In this instance,the portion 42 has an offset bend 44 connecting it to the portion 41.Bent as described, the portion 42 engages the adjacent surface of thedrill block and positions the sleeve member 18 endwise with respect tothe drill block 10. At the same time, the end portion 42, by beingbrought against the side of the stud bolt 43, prevents rotation of thesleeve member 18 when in use.

As evidence of still an additional configuration which may be given tothe formed member within the scope of the invention, there is shown inFIGS. 13, 14, 16 and 16 a stamping 50 having a portion 51 containing ahole 52 encircling the sleeve member 18 and a portion 53 extendingradially as shown in fig. 13. The portion 53 includes a reverse loop 54which extends in a direction parallel to the axis of the sleeve 18, sothat it is adapted to engage the adjacent face of the drill block 10.The reverse loop 54 is of such configuration that the end of theportion- 53 is at a location spaced from the adjacent face of the drillblock 10 where it is brought into engagement with a stud bolt 55 toprevent rotation of the sleeve during use and by means of whichadditionally the sleeve member may be held within the bore 13 of thedrill block in its selected position.

In the form of invention of FIGS. 17 through 20 there is a slightlymodified formed member 60. In FIG. 17 for example, the formed member 60has a hole 61 extending around the sleeve member 18 but there isadditionally a spacing collar 62 which may be a separate piece solderedon or formed from the member 60 itself in an appropriate punching orstamping operation. An axially extending area 63 on the exterior of thesleeve member 18 lies within the hole 61 where it is fastened. Theformed member 60 has a radially extending end portion 64 which isadapted to engage a stud bolt 65 in the usual way. In this form of theinvention the collar 62 serves to limit axial shift of the sleeve member18 with respect to the drill block 10. By spacing the entrance end ofthe sleeve member 18 from the drill block 10, there is provided a fixedrenewable guide sleeve assembly of a readily usable sort.

In the form of invention of FIGS 21 through 24 an extremely simple flatstamping indicated generally by the reference character 70 is formedsomewhat differently with respect to both the end portion 71 and theopposite end portion 76. In this form of the device, the end portion 71is bent to form an endmost projection extending radially into a hole 73,the hole being open laterally adjacent the projection 72, an endwiseopen slot 74 is provided in the sleeve member 18', adjacent an entranceend 75, wherein the projection 72 can be anchored by appropriate means.The thickness of the stamping 70 determines the spacing of the entranceend from the drill block. In the end section 76 is an arcuate recess 77adapted to partially receive a shank 78 of a stud bolt 79 at a locationbeneath the bolt head 80. Assembled in this fashion, the guide sleeveassembly can be dropped into the bore 18 and anchored against furtherrotational movement by application of the stud bolt 79. The guide sleeveassembly can be easily removed by first removing the stud bolt 79 torelease the end portion 76 from its position anchored under the head ofthe stud bolt 79 and then merely lifted from the bore 13 to allowreplacement with another guide sleeve assembly which may have forexample, a central axial passage sized to fit a twist drill of differentdiameter, or perhaps a reaming tool.

It will be clear from the foregoing description of subject matter andassembly thatinasmuch as the sleeve member 18 has a uniform exteriorconfiguration, it can be made from tubular stock or bar stock ofindefinite length with parts merely cut off to desired length. When anarea like the perimetral area 20 is employed, the forming of it is asimple operation and virtually the only machining operation needed forthe sleeve member 18. The other member of the assembly, namely theformed member in each instance, is a physical form of singularlyinexpensive character and can be readily given its desired configurationby a simple stamping, pressing or molding operation and engaged with thesleeve by sliding it over the end. Accordingly, material cost is heldsubstantially to a minimum and the forming and assembly operations areconsiderably simplified resulting in a drill jig guide sleeve assemblywhich is of low cost and of dependable construction.

Having described the invention, what is claimed as new in support ofLetters Patent is:

1. A drill bushing guide assembly for releasable application to a drillblock having a cylindrical bore therein, said assembly comprising asleeve member having a bore therethrough with an entrance end and exitend for a drill bit, the exterior of said sleeve member beingcylindrical in form from end to end of a diameter forming a closesliding fit in said bore, the diameter of all portions of the exteriorof said sleeve member being no greater than the diameter forming theclose sliding fit, a radial extension member for said sleeve membercomprising a metal element of substantially flat stock having a holetherethrough of fixed diameter substantially equal to the exteriordiameter of said sleeve member, said sleeve member being located in saidhole and having a rotation inhibiting attachment to said extensionmember adjacent the entrance end of the sleeve member whereby to anchorthe extension member against endwise and rotational movement relative tosaid sleeve member, a first portion of said extension member adjacentsaid entrance end being axially spaced from a second portion of saidextension member facing said exit end, said second portion having anoperative position in engagement with the drill block whereby to spacethe entrance end-from the drill block, and an anchor element on thedrill block spaced radially from said bore engageable with saidextension member in a rotational direction whereby to prevent rotationof said sleeve member during operation.

2. A drill bushing guide assembly according to claim 1 wherein theextension is a relatively flat member having a thickness sufficient toprovide the spacing of said entrance end from said drill block.

3. A drill bushing guide assembly for releasable application to a drillblock having a cylindrical bore therein, said assembly comprising asleeve having a bore therethrough with an entrance end and an exit endfor a drill bit, the exterior of said sleeve being cylindrical in formfrom end to end and of a diameter forming a close sliding fit in saidbore, a radial extension for said sleeve comprising a metal element ofsubstantially flat stock having a hole therethrough of diametersubstantially equal to the exterior diameter of said sleeve, said sleevebeing located in said hole and having an attachment to said extensionadjacent the entrance end of the sleeve whereby to anchor the extensionagainst endwise and rotational movement relative to said sleeve, a firstportion of said extension adjacent said entrance end being axiallyspaced from a second portion of said extension facing said exit end,said second portion having an operative position in engagement with thedrill block whereby to space the entrance end from the drill block, andan anchor element on the drill block spaced radially from said boreengageable with said extension on a rotational direction whereby toprevent rotation of said sleeve during operation, the extension being arelatively flat member having a thickness sufficient to provide thespacing of said entrance end from said drill block, means forming arecess in the exterior of said sleeve and a projection on said extensionsecured in said recess comprising the attachment of said extension tosaid sleeve, said extension having a recess for reception of said anchorelement.

4. A drill bushing guide assembly as in claim 1 wherein said extensionhas the form of a U-shaped curve with a long leg of the U-shaped curvein engagement with the block and the anchor element.

5. A drill bushing guide assembly as in claim 1 wherein said extensioncomprises a pair of adjacent parallel longer and shorter elements, saidshorter element being bent to substantially a right angle with the faceend thereof adapted to engage the drill block and the longer elementbeing adapted to engage said anchor element.

6. A drill bushing guide assembly as in claim 1 wherein said extensionhas a bend intermediate the portion with the hole and a free end, thebend being in a direction substantially endwise with respect to thesleeve whereby to offset the free end of the extension relative to theother end and space said exit end from the drill block.

7. A drill bushing guide assembly as in claim 6 wherein the free end isin engagement with the drill bock.

8. A drill bushing guide assembly as in claim 6 wherein the bent portionis in engagement with the drill block.

9. A drill bushing guide assembly as in claim 1 wherein there is aspacing collar on the extension in axial alignment with the hole, saidcollar being adapted to engage the drill block whereby to space the exitend of the sleeve from the drill block.

1. A drill bushing guide assembly for releasable application to a drillblock having a cylindrical bore therein, said assembly comprising asleeve member having a bore therethrough with an entrance end and exitend for a drill bit, the exterior of said sleeve member beingcylindrical in form from end to end and of a diameter forming a closesliding fit in said bore, the diameter of all portions of the exteriorof said sleeve member being no greater than the diameter forming theclose sliding fit, a radial extension member for said sleeve membercomprising a metal element of substantially flat stock having a holetherethrough of fixed diameter substantially equal to the exteriordiameter of said sleeve member, said sleeve member being located in saidhole and having a rotation inhibiting attachment to said extensionmember adjacent the entrance end of the sleeve memBer whereby to anchorthe extension member against endwise and rotational movement relative tosaid sleeve member, a first portion of said extension member adjacentsaid entrance end being axially spaced from a second portion of saidextension member facing said exit end, said second portion having anoperative position in engagement with the drill block whereby to spacethe entrance end from the drill block, and an anchor element on thedrill block spaced radially from said bore engageable with saidextension member in a rotational direction whereby to prevent rotationof said sleeve member during operation.
 2. A drill bushing guideassembly according to claim 1 wherein the extension is a relatively flatmember having a thickness sufficient to provide the spacing of saidentrance end from said drill block.
 3. A drill bushing guide assemblyfor releasable application to a drill block having a cylindrical boretherein, said assembly comprising a sleeve having a bore therethroughwith an entrance end and an exit end for a drill bit, the exterior ofsaid sleeve being cylindrical in form from end to end and of a diameterforming a close sliding fit in said bore, a radial extension for saidsleeve comprising a metal element of substantially flat stock having ahole therethrough of diameter substantially equal to the exteriordiameter of said sleeve, said sleeve being located in said hole andhaving an attachment to said extension adjacent the entrance end of thesleeve whereby to anchor the extension against endwise and rotationalmovement relative to said sleeve, a first portion of said extensionadjacent said entrance end being axially spaced from a second portion ofsaid extension facing said exit end, said second portion having anoperative position in engagement with the drill block whereby to spacethe entrance end from the drill block, and an anchor element on thedrill block spaced radially from said bore engageable with saidextension on a rotational direction whereby to prevent rotation of saidsleeve during operation, the extension being a relatively flat memberhaving a thickness sufficient to provide the spacing of said entranceend from said drill block, means forming a recess in the exterior ofsaid sleeve and a projection on said extension secured in said recesscomprising the attachment of said extension to said sleeve, saidextension having a recess for reception of said anchor element.
 4. Adrill bushing guide assembly as in claim 1 wherein said extension hasthe form of a U-shaped curve with a long leg of the U-shaped curve inengagement with the block and the anchor element.
 5. A drill bushingguide assembly as in claim 1 wherein said extension comprises a pair ofadjacent parallel longer and shorter elements, said shorter elementbeing bent to substantially a right angle with the face end thereofadapted to engage the drill block and the longer element being adaptedto engage said anchor element.
 6. A drill bushing guide assembly as inclaim 1 wherein said extension has a bend intermediate the portion withthe hole and a free end, the bend being in a direction substantiallyendwise with respect to the sleeve whereby to offset the free end of theextension relative to the other end and space said exit end from thedrill block.
 7. A drill bushing guide assembly as in claim 6 wherein thefree end is in engagement with the drill bock.
 8. A drill bushing guideassembly as in claim 6 wherein the bent portion is in engagement withthe drill block.
 9. A drill bushing guide assembly as in claim 1 whereinthere is a spacing collar on the extension in axial alignment with thehole, said collar being adapted to engage the drill block whereby tospace the exit end of the sleeve from the drill block.